// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#include <pollux/functions/prestosql/types/utils/timestamp_with_time_zone_input_generator.h>

#include <pollux/common/utils.h>
#include <pollux/functions/prestosql/types/timestamp_with_time_zone_type.h>
#include <pollux/type/variant.h>
#include <pollux/type/tz/time_zone_map.h>

namespace kumo::pollux::fuzzer {
    TimestampWithTimeZoneInputGenerator::TimestampWithTimeZoneInputGenerator(
        const size_t seed,
        const double nullRatio)
        : AbstractInputGenerator(
              seed,
              TIMESTAMP_WITH_TIME_ZONE(),
              nullptr,
              nullRatio),
          timeZoneIds_(tz::getTimeZoneIDs()) {
    }

    variant TimestampWithTimeZoneInputGenerator::generate() {
        if (coinToss(rng_, nullRatio_)) {
            return variant::null(type_->kind());
        }

        int16_t timeZoneId =
                timeZoneIds_[rand<size_t>(rng_, 0, timeZoneIds_.size() - 1)];

        return pack(rand<int64_t>(rng_, kMinMillisUtc, kMaxMillisUtc), timeZoneId);
    }
} // namespace kumo::pollux::fuzzer
